The greatest ignorance is the conventional wisdom that 800 frontrunners need to push the third 200. Dwight Stones and countless others will never shut up with that ridiculous theme.
You've already done the work. Why give it away with a masochistic backstretch? It only works if you are easily the class of the field, or if you have gotten away with a dawdling opening 400 yet still lead.
Arop and numerous other frontrunners have fallen victim to that stupid tactic. Arop changed his style once he realized it didn't work at highest level.
A far superior tactic is to back off around the first turn of the second lap and see if the field will be content to settle behind you. Mary Moraa has gotten away with that countless times. Likewise Keely a few times, after stealing if from Moraa.
If they are tame and intimidated enough to stay there, now you've got plenty left to kick away at the 200 mark. It's essentially the tactic Kipyegon has used in almost every 1500 race her entire life.
Granted, the men's 800 fields these days won't often be content to sit back. But once I saw the 49 today I was yelling for Hoey to back off and attempt it. If he had managed even 30 or 40 meters at slightly reduced paced it could have made all the difference at the end.